I am a global warming skeptic. I am in fact very skeptical about the whole idea that carbon dioxide (CO2) can cause global warming. The funny part is that I was not always a skeptic. A few short years ago I wasn't a skeptic at all. It was my research into the science of global warming that turned me into a skeptic. The conclusion I reached from my research was that atmospheric CO2 plays a very minor role in regulating the Earth's temperature.